Roasting-furnace.



No. 843,825. PATENTED FEB. 12, 1907.

- P. KLEPETKO.

ROASTING FURNACE.

APPLICATION FILED SEPT. e, 1904.

' 2 suns-sum 1.

i I v I M: Kev/ 17 PATENTED FEB. 12, 1907.

2 SHEETS-SHEET 2.

F.:K'LEPETKO. ROASTING FURNACE. APPLICATION FILED SEPT. 6

[plied thereto.

earner ora ion,

FRANK KLEPETKO, or NEW YORK, N. r.

RoAsriNe-FuRsACs Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed September 6. 1904., SerialNo. 223,539.

To It 107mm if may concern: Be it known that I, FRANK KLEPETKO, citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Roasting-Furnaces, of which the following is a full, clear, and eX- act description, reference being had to the accompanying drawings, forming a part hereof. My invention has relation to improvementsin roasting-furnaces and it consists in the novel construction and arrangement of parts more fully setforth in the specification and pointed out in the claims. I

In the drawings, Figure 1 is a vertical centra l-section of a conventional McDougall oreroasting furnace, showing my invention ap- Fig. 2 is an enlarged vertical section of the rabble shaft and arms,'showing the cooling mechanism applied thereto. Fig. 3 is a cross-section on line 3 3 of Fig. 2. F ig; 4 is a modification showing the waterfeed pipe entering and discharging at the bottom. Fig. 5 is-a modification showing a slightly different-,mode of mounting the distributing-pipes, and Fig. 6 is a modification showing the water-feed pipe entering at'the 'lating water or other medium.

bottom byit discharging at the top of the rab ble-shaft. The" present invention is an improvement in the water-cooling features of the McDongall type of ore-roasting furnace; but it is more specially directed to overcome objections inherent in the construction shown and described in United States Letters Patent. 700,339, granted to William J. Evans and myself under date of May 20, 1902.

The special object of the present improve ment is to establish a more efiective circulation through the hollow arms carried by the rabble-shaft, thereby utilizing to the! best advantage the cooling possibilities of the circu- In the patent above referred to and in other constructions which employ a series of distributing-pipes leading from the ,main water-feed pipe the water, taking as it does, the path of least resistance, will ten to flow through the distributing-pipes n arest the point of supply orjfeed end of the'feed=pipe,

and thus" produce an uneven distribution of the cooling 'medium. In my resent improvement the feed-pipe maybe stationary,

as mv Patent 733,658, dated July 14, 1903, or'.'t may be rotatable, as in the Klepetko-Evans construction above referred to, the choice depending on the conditions which must be met. In thepresent improvement the water-feed pipe having no distributingpipes attached'thereto can be readily taken out through the end of the shaft by simply removing the stuffing-box when occasion for its removal arises.

The advantages ofv the present invention will be better apparent from a detailed description thereof, which is as follows:

Referring to'the drawings, F-represents the furnace, and h the several hearths in which the material is treated, the said material dropping from the upper hearths succes sively through'the several hearths until it is delivered into the delivery-hopper C, the hearths being provided, respectively, with the central and marginal openings 1 2 for the passage of the material. Passing through the hearths is the rotatable hollow rabbleshaft 3, from which radiate theseries of hol low rabble or stirrer arms 4, extending into the severalhearths and carrying rakes 5, by which the material is successively fed from one hearth to the hearth immediately beneath it, all as fullyunderstood in the art.

Referring again to the drawings, and more ,particularl to F i s. l to 3 inclusive, 6 re Y 3 I P resents a water-feed pipe (preferably stationary) which is located within the shaft, extending to a short distance from the closed bottom of the latter, the lower end of the said feed pipe being open and discharging into the shaft. The shaft is divided into a series of chambers a h c d ef g, the chambersbeing separated from one another by the trans-- versely-disposed division Walls or partitions .7, occupying aflane slightly above the bottom of the a jacent rabble-arms each chamher'having leading, therefrom the distributing conduitsor pipes 8, which extend into the hollow arms 4- and discharge thereinto. Under this arrangement the water discharged into the bottom chamber-e flows thronghthe lower series of pipes 3 into the bottom rabble-arms,- thence flowinginto the second chamber 6, .and from this through the next series of distributing-pipes and their corresponding rabble-arms, and so on till the water reaches the outlet pipes or taps 9,

where '(at a poin-t adjacent to" the feed end of the feed-pipe) it discharges into a troughlO. As seen from the foregoing the feed-pipe 6 passes through the. several part-itionsor division-walls 7, and in order that there shall *be no leakage at thesepoints a connecting- 1 nipple 1-1 is placed around the pipe, where it' passes through the partition, said nipple being turned true and the partition drilled and reamed, 'making a practically water-tight joint. The pipe 6 receives its supply froman extension 6, as shown.

' From the foregoing it will be a parent that the cooling medium'must take t 18 course in- IQ dicated (and shown by the arrows) and that a-positive and even delivery of coolwater will result throughout the entire system of rabble-arms. Each rabble-arm must receivefits'water from one/chamber before it, candeliver itto,the'nex t succeeding chamber of the shaft, and the circulation will'thus' be uniform and positive at all times. In this particular it willmake no difference whether the feed-water-is introduced through the top 20 or bott m solongas the remaining features ofaconstruction are not materially disturbed. Thus in Fig.4 I have shown 'a modification in which the water-feed pipe 6 is introduced through the bottom of the shaft, the point of discharge into the chamber a being correspondingly the same as in the construction previously described.

In the forms thus far described the point of connection of the distributing pipes or conduits 8 is with the peripheral walls of the respective chambers; but I may conduct the water through the partition or division wall, asshown in the modification in Fig. 5, where the distributing-pipesfi are connected to a' 3 5 hollowtaperedpr screwedTl2, carried directly by the partition 7-, the latter in this case being preferably disposed in theplane of the bottom of the rabble-arm. v

The feed-pipe while preferably extending 40 through the several partitions 7 from top to bottom may extend inversely from bottom to top, as shown in the modification in Fig. 6.

In that c'ase the feed-pipe 6 discharges into the chamber 9 above the last partition,' the water of circulation being under the circumstances-forced downward, as shown by the arrows in said figure, it being understoodthat the static head driving the current shouldbe sufficient to insure a sufficiently rapid circulation before any of the water is converted intosteam, In this last modification provision-is made to allow for the escape of accumulated air or vapor in the form of a cook 13, which can be opened just prior to the in-- troductionof the water. The dischargewaters are allowed to escape through taps 9 intoa trough (not shown) arranged in any manner so as not to interfere with the driving mechanis for the shaft. 60 Where the feed-pipe is introduced into the I shaft from the top, as is shown in Fig. 2, the same maybe made to terminate at or in the chamber-g without passing through the partitions dividing the several chambers. In

6 5 that event the circulation of the water would be similar to that shown in Fig. 6that is to say, it: would be: downward through the shaft. I do not herein illustrate such modification; but. evidently it would be the inverse of that shown in'Fig. 4that is to say. T c

the feed-pipe would terminate in the top chamber instead of the bottom chamber.

. It is apparent that I may depart from the details here shownfwithout in any "WISQQtfl GCtF.

'ing the nature or spirit of my invention.

The cooling mechanism need not necessari"=' be restricted in its application to roasting furnaces, but may be applied to other fur 'naces as'well.

Having. described my invention, Wham-Ito '1. In a furnace havingfaplurality of hearths, arotatable hollow shaft passingthrough the hearths', a series of hollow arms radiating from said shaft and extending into the several hearths, a series of chambers distributed throughout the shaft and coin+ 'municating with the'hollowarms, and a-feedpipe communicating with one of the .termi-L nalchambers of the series. for conveying a cooling medium thereinto, substantiallyas: set-forth. I u i 2. In a furnacehaving a plurality of hearths, arotatable hollow shaft passing through the hearths, a series of hollowarms- 5 I radiating from said shaft and extending into I the several hearths, a series of-chambersdis+ tributed throughout the shaftand comml catin'g with'the hollowarms, and'a Water feed pipe extending through the several 10o chambersand discharging its water ir'itdthe-- same, substantially as set forth.

3. In a furnace having a plurality of hearths', a rotatable hollow shaft passing through radiating from said shaft arid extending intothe several hearths, a series of chambers dis. tributer throughout the shaft and com-- municatingwith the hollow arms, anda was. x tor-feed pipe extending through the several uo chambers and discharging its water into the bottom chamber of theseries, substantiallyas set forth. 4. In a furnace having a plurality of hearths, a rotatable" hollow shaft passing I15 I through the hearths, a series-of hollow'arms radiating from said shaft and extending into the several hearths, a series of chambers dis- I tributed' throughout the shaft and com.-

municating with the hollow arms, and a star- 20 tionary water-feed pipe extending through the several chambers. and discharging its water into thebottom chamber of the series;

substantially as set forth 5. In a furnace having a plurality of I25 hearths, a rotatable hollow shaft passing through the heart-.hs, a series of hollow armsradiating from said shaft. and extending into the several hear-tbs,- a series of chambers sepia.

rated by transversepartitions, distributed 1 o the hearths,' a series of'hollow arms 10.5"

throughout the shaft, distributing-conduits I located within and discharging into the 6 leading from the respectlve chambers and shaft, and conduits or distributing-pipes disopening into the adjacent series of hollow arms, and a feed-pipe extending through the several chambers and discharging its circulatmg medium into the bottom chamber of the series, substantially as set forth.

6. In a furnace having a plurality of hearths, a rotatable hollow shaft passing through the hearths, a series of hollow arms radiating from said shaft and extending into the several hearths, a series of chambers distributed throughout the shaft, distributingpipes leading from the respective chambers into the adjacentseries of hollow arms and opening into the latter, and a water-feed pipe extending through the several chambers and discharging its water-into the bottom chamber of the series, substantially as set forth. 7

7. In a furnace having a plurality of hearths, a rotatable hollow shaft passing through the hearths, a series of hollow arms radiating from said shaft and extending into the several hearths, a series of chambers distributed throughout the shaft and communicating with the hollow arms, and a feedpipe extending through the several chambers for conve 11g a cooling medium to one end of the sha and allowing the same to circulate through the shaft and the hollow arms thereof, substantially as set forth.

8'. In a furnace having a plurality of hearths, a rotatable hollow shaft passing through the hearths, a series of hollow arms radiating from said shaft and extending into the several hearths, an inner water-feed pipe" located within the shaft and discharging thereinto, a series of conduits or distributing pipes coupled to the shaft and located within the hollow arms and communicating respectively therewith and with the shaft, the water discharged from the feed-pipe freely circulating through said conduits or pipes and through the hollow arms and shaft, substantially as set forth.

9. In a furnace having I a plurality of hearths, a rotatable hollow shaft passing through the hearths, a series of hollow arms radiating from said shaft and extending into the several hearths, an innerstationary ,water-feed pipe located within the shaft and discharging thereinto, a series of conduits ordistributing-pipes coupled to the shaft and located within thehollow arms and coinmunicating respectively therewith and with the shaft, the water discharging from the feed-pipe freely circulating through said (011- duits or pipes and through the hollow arms E and shaft, substantially as set forth.

10. In a furnace having one or more. hearths, a rotatable hollow shaft passing. through the same, a series of hol ow arms v radiating from said shaft and extra ling into theseveral hearths, an inner water-i eed pipe connected from the feed-pipe located Within the hollow arms and conveying the water discharged into the shaft from the feed-pipe tically in series, means for discharging the circulating medium into the bot-tom of the shaft, means independent of the arms providing for circulation from the shaft radially in multiple, said independent :neans discharging into the hollow arms, a the latter discharging their contents into the shaft, and means for conducting the circulating mediul. out of the shaft from the top thereof, substantially as set forth.

13. In a roasting-furnace, a hollow shaft, hollow -stirrerarms on the shaft, means f r circulation through the shaft and arms vertically in series, means independent of the arms providing for circulation from the shaft radially outwa d in mulitple, and through the arms radially inward in mulitiple, and outletmeans for the circulating medium at us end of theshaft, substantially as set orth.

14. In a roasting-furnace, a holh r shaft, hollow stirrer-arms on the shaft. means for circulation through the shaft and arms vertically in series. means independent of the arms providing for circulation from the shaft radiallv outward in multiple, and through the arms radially inward in multi lo, and in let means and outlet means for t 1e circulat- 

